Sauqua



water-engines generally and drilled I Sintra new can.

THOMAS E. EVANS, WILLIAM R. THOMAS, AND JOSHUA HUN'IXOF GATA- SAUQUA, PENNSYLVANIA.

Laim Patent No. 98,156, dared Damm 21, 1s69.-

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern Be it known that we, THoMAsE. EVANS, WILLIAM R. THOMAS, and J osHUA HUNT, of Oatasauqua, in the county of Lehigh, and State of Pennsylvania, have invented a new and useful Improvement in Valve- Gear; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to a new and useful improvenient in mode of operating valves of steam-engines, more especially designed for pumping-engines, but applicable to other purposes, or to va/lves of steam and It, consists in the use of inclined planes for governing the motion of the Valve, whereby the jar and concussion produced in pumping engines by the ordinary tappet-movement are avoided, as will be hereinafter more fully described.

The accompanying drawing represents a view of a pumping-engine, showing the valve operated according to our invention.

Similar letters of reference indicate corresponding parts'. v

A is the steam-cylinder. y

I B B are pumping-cylinders connected therewith, the whole being operated or worked with the respective pistons on a common piston-rod, C.

D is the steam-chest, which contains the slide-valve.

E is the valve-rod. .A

F E represent guide-stands, through which the valve-rod passes. These stands are attached to the steam-cylinder, as seen in the drawing.

G G are bent levers, in the form of bell-cranks, which are pivoted tothe arms H H, extending from the guide-stands F F.

I I represent the pivot-pins.

J J represent the inclined planes, which form the distinguishing feature of our invention.- These inclned planes partake of the motion of the pistons. They are connected with the piston-rod C by means of the arms K K, and slide back and forth on the bars L L. 'Ihese bars are supported at each end by they steam and pumping-cylinders, as seen in the drawing.

The arms in, of the bell-cranks G, are provided with friction-rollers, n n, which rest on the inclined planes J J, while the other arms, O, are brought in Contact with the ends of the valve-rod E.

Itiwill be seen, that as a reciprocating motion is given to the pistons and piston-rod, the inclined planes will be carried under the arms m, which movement will raise those arms, while the other arms, 0, will be carried in contact with, and move the valve-rod and the valve. A

' 'The inclined planes cause the gradual opening and closing of stroke, thus preventing concussion or jar. l

The steam is gradually introduced, upto 'a certain point, when the steam acts upon the valve and throws the portsv wide open, and the whole power of the steam is applied to the pumps, without jar or concussion.

The inclined planes may beof any suitable angle, and the bent levers, or bell-cranks, G, may be varied in form, as may be found advisable.

Having thus described our invention,

IVe claim as new, and desire to secure -by Letters Patent- Y In combination with a valve-gear, the inclined planes J J, arranged and operating substantially as'and for the purposes herein shown and described.

THOMAS E.' EVANS. WM. R. THOMAS. Witnesses: JOSHUA HUNT.

R. CLAY HAMERSLY, M. BERGER.

the steam-valve at certain points in the 

